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Handling messages

As a scripter, you write message handlers to respond to messages. When an object receives a message, HyperCard searches the object’s script for a handler with the same name (a handler starts with the word on followed by the name of a message). If HyperCard finds a match, it runs any HyperTalk statements in the handler until it hits an end statement.

For example, if you want a button to respond to a mouseUp message, you would add a mouseUp message handler to its script.

Click Related Topics for more information about opening a script window.